Collapsible reinforcement for concrete columns.



Patented Nov. 3, 1914.

Cfi ps/vpfier J [Vb 7 0 rr WASHINGTON. D. Cv

TH =7 NORRIS PETERS CO. PHOm-LlTh A. BINDLEY & C. J. MOGAN. COLLAPSIBLE REINFORCEMENT FOR CONCRETE COLUMNS. APPLICATION FILED NOV 14, 1912 1, 1 1 5,491

of WITNESSES ALBION BINDLEY AND CHRISTOPHER. J. MOGAN, or GHAB-LEROI, PENNSYLVANIA,

ASSIGNORS TO PITTSBURGH STEEL PRODUCTS COMPANY, SYLVANIA, A CORPORATION OF PENNSYLVANIA.

OF PITTSBURGH, PENN- GO'LLAPSIELE REINFORCEMENT FOR CONCRETE COLUMNS.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed November 14, 1912. 1 Serial No. 731,247.

To all whom it may concern Be it known that we, ALBION BINDLEY and CHnrs'rorHnR J. MOGAN, citizens of the United States, and residents of Charleroi,

in the county of Washington and State of have invented certa1n new Pennsylvania, and useful Improvements in Collapsible Reinforcements for Concrete Columns, of which the following is a specification.

Our invention relates to new and useful improvements 1nv metallic reinforcements for concrete and is particularly adapt-ed for -r einforcing concrete columns and similar structures made of concrete,

The primary object of the invention'is to simplify and cheapen the construction of a collapsible reinforcing structure for concrete columns and especially of the polygonal type but reinforcement in accordance with this invention may be utilized for reinforcing other structural types without departing from the spirit thereof.

The invention will be shown and described as applied to square or rectangular types of reinforcement particularly adapted for concrete columns but it will be understood that such showing is made for the-purpose of illustration only and is not in any sense to be taken as limiting the invention to this type of structure.

To these ends the invention consists in the improved construction of reinforcement for concrete hereinafter more particularly described and then specified in the claim.

In the accompanying drawings, Figure 1 illustrates a vertical section through a concrete column in which is embedded a collapsible reinforcement constructed in accordance with this invention, the reinforcement being shown in side elevation. Fig. 2 is an enlarged transverse section taken on the line 2, 2 Fig. 1. Fig. 3 is a plan view of the spacing frame detached from the structure. Fig. 4 is a plan view showing the reinforcement collapsed. Fig. 5 is a transverse sec tion through a reinforcement having additional longitudinal strengthening bars. Fig. 6 is a side elevation of a portion of the reinforcement looking at the side perpendicular to that shown in Fig. 1. Fig. 7 v is a transverse section through a reinforcement modified as to its outer contour.

1, 2, 3 and 4 indicate the longitudinal members of the reinforcement which in the form illustrated represent the corners of the structure. These members are preferably rolled bars or: rods, square or rectangular in form, having longitudinal ridges 5 rolled thereon. The said members are arrangedin pairs, as for instance, 1 and 2, 3 and 1, and each bar of a pair rigidly united to the other bar of the pair by transverse members or bars 6 at spaced intervals throughout the length .of the longitudinal members so as to form two separate rigid frame members, which the completed reinforcement, are spaced apart any desired distance. By preference the transverse bars 6 are welded to the longitudinal bars at the points of intersection by the passage of an electric current through the superposed pieces and the application ofp'ressure in a manner well known to those skilled in the art, the ridges 5 serving to assist in the weldingtoperation In a manner now well known 1n-th1s art. If desired, the bars 6 may also be provided with pro ecting portions or ridges disposed to intersect the ridges 5 and welded thereto. The preparation of the members 1, 2, 3, 1 and 6 for the welding process forms no part of our invention and it will be understood that any suitable means for effecting. the union of the parts may be employed.

7 indicates separators or straps disposed transversely to the side frames above described and which serve to connect the two frames to each other. There may be any desired number of these separators disposed throughout the length of the structure and spaced apart at any desired distance. By preference but a few of these members are employed as compared with the number of transverse bars 6 which form part of the side frames. The separators are pivotally connected with the side frames, preferably by providing an eye or loop 8 at each end which loosely surrounds the longitudinal members so as to permit said members to turn with relation. to the separators. The separators are preferably held in place on the longitudinal bars 1, 2, 3 and 1 between pairs of transverse bars as indicated at 6' Fig. 1.

The structure collapses for convenience members, they intersect.

posite longitudinal bars approaching each other. By this manner of collapsing, the collapsed structure is of no greater length than the structure when in erected position, in contradistinction to previous forms wherein the longitudinal members approach each other to collapse the structure by comining a lengthwise motion.

10 indicates a spacing frame which, When the structure is in extended position and prior to embedding it in the concrete 9, is 'slipped over the ends of the longitudinal members to hold the structure rigidly in such extended position. Preferably a spaciiig frame is provided at each end of the structure and obviously its contour Will vary with the difierent cross-sections of reinforcement with which it may be desired to use it. The frame 10 preferably consists of a lengthof metal of any desired cross-section, bent into the desired shape and having, eyes or loops 11 at each corner. These eyes or loops may be formed in any suitable manner, preferably by Welding, as at l2, a short piece of Wire to the sides of the frame around the corners. Y If desired, additional longitudinal bars .lfi m'ay be provided on two or more of the sides of the structure, which bars may if desired be Welded or otherwise joined to the Also if desired eyes may be provided on suitable loops or Washin gt members. having ends loosely encircling the the spacing frames 10 to properly hold and space these additional bars when used.

I It Will be understood that our invention may be employed with structures of any desired cross-section and for reinforcing any style of concrete construction to which it is suitable and that it is not limited to the forms shown and described. It will also be understood that the invention is not limited to the details of construction herein set forth except as may be expressed in the appended claim. A v

lVhat we claim as ourinvention is In a collapsible-metallic reinforcement for concrete the combination of separate side frames comprising longitudinal and trans verse members Welded to each other and longitudinal members of said frames, some of said transverse members being arranged closely parallel to an adjacent transverse member. and closely confining the encircling ends of the othermembers.

Signed at Monessen, in the county of lVestmoreland and State of Pennsylvania, this 4th day of November, A. D. 1912.

ALBION BINDLEY. CHRISTOPHER J. MOGAN.

Witnesses: I

EDWARD, H, BINDLEY, W. W. MCNE'ILL.

g the Commissioner of Iatents, 011 1). G. 

